http://img.mukewang.com/58468...
private static String dateFormat;
private static SerializeConfig mapping = new SerializeConfig();
static {
dateFormat = "yyyy-MM-dd HH:mm:ss";
mapping.put(Date.class, new SimpleDateFormatSerializer(dateFormat));
}
String jsonString = JSONObject.toJSONString(deal,mapping,SerializerFeature.WriteDateUseDateFormat);
这个方法是把jsonString放入redis中，但有两个方法同时放一个redis中，这两个方法的deal实体类中的属性还不相同，其他代码都一样，不知道是不是这个问题，希望有大神给解释一下
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
It seems that the thread of SimpleDateFormat is not safe, and multi-thread concurrency will cause this
It doesn’t feel necessary to be so complicated, it’s very simple to use
fastjson